5d0b515619307d0fccdd78fac0b2a763531faeed
[people/mcb30/busybox.git] / coreutils / mv.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * Mini mv implementation for busybox
4  *
5  * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
6  * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
7  *
8  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9  */
10
11 /* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
12  *
13  * Size reduction and improved error checking.
14  */
15
16 #include <sys/types.h>
17 #include <sys/stat.h>
18 #include <dirent.h>
19 #include <getopt.h> /* struct option */
20 #include "libbb.h"
21 #include "libcoreutils/coreutils.h"
22
23 #if ENABLE_FEATURE_MV_LONG_OPTIONS
24 static const char mv_longopts[] ALIGN1 =
25         "interactive\0" No_argument "i"
26         "force\0"       No_argument "f"
27         ;
28 #endif
29
30 #define OPT_FILEUTILS_FORCE       1
31 #define OPT_FILEUTILS_INTERACTIVE 2
32
33 static const char fmt[] ALIGN1 =
34         "cannot overwrite %sdirectory with %sdirectory";
35
36 int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
37 int mv_main(int argc, char **argv)
38 {
39         struct stat dest_stat;
40         const char *last;
41         const char *dest;
42         unsigned long flags;
43         int dest_exists;
44         int status = 0;
45         int copy_flag = 0;
46
47 #if ENABLE_FEATURE_MV_LONG_OPTIONS
48         applet_long_options = mv_longopts;
49 #endif
50         // Need at least two arguments
51         // -f unsets -i, -i unsets -f
52         opt_complementary = "-2:f-i:i-f";
53         flags = getopt32(argv, "fi");
54         argc -= optind;
55         argv += optind;
56         last = argv[argc - 1];
57
58         if (argc == 2) {
59                 dest_exists = cp_mv_stat(last, &dest_stat);
60                 if (dest_exists < 0) {
61                         return 1;
62                 }
63
64                 if (!(dest_exists & 2)) {
65                         dest = last;
66                         goto DO_MOVE;
67                 }
68         }
69
70         do {
71                 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
72                 dest_exists = cp_mv_stat(dest, &dest_stat);
73                 if (dest_exists < 0) {
74                         goto RET_1;
75                 }
76
77  DO_MOVE:
78                 if (dest_exists && !(flags & OPT_FILEUTILS_FORCE)
79                  && ((access(dest, W_OK) < 0 && isatty(0))
80                     || (flags & OPT_FILEUTILS_INTERACTIVE))
81                 ) {
82                         if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
83                                 goto RET_1;     /* Ouch! fprintf failed! */
84                         }
85                         if (!bb_ask_confirmation()) {
86                                 goto RET_0;
87                         }
88                 }
89                 if (rename(*argv, dest) < 0) {
90                         struct stat source_stat;
91                         int source_exists;
92
93                         if (errno != EXDEV
94                          || (source_exists = cp_mv_stat(*argv, &source_stat)) < 1
95                         ) {
96                                 bb_perror_msg("cannot rename '%s'", *argv);
97                         } else {
98                                 if (dest_exists) {
99                                         if (dest_exists == 3) {
100                                                 if (source_exists != 3) {
101                                                         bb_error_msg(fmt, "", "non-");
102                                                         goto RET_1;
103                                                 }
104                                         } else {
105                                                 if (source_exists == 3) {
106                                                         bb_error_msg(fmt, "non-", "");
107                                                         goto RET_1;
108                                                 }
109                                         }
110                                         if (unlink(dest) < 0) {
111                                                 bb_perror_msg("cannot remove '%s'", dest);
112                                                 goto RET_1;
113                                         }
114                                 }
115                                 copy_flag = FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS;
116 #if ENABLE_SELINUX
117                                 copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
118 #endif
119                                 if ((copy_file(*argv, dest, copy_flag) >= 0)
120                                  && (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
121                                 ) {
122                                         goto RET_0;
123                                 }
124                         }
125  RET_1:
126                         status = 1;
127                 }
128  RET_0:
129                 if (dest != last) {
130                         free((void *) dest);
131                 }
132         } while (*++argv != last);
133
134         return status;
135 }